Hi there, mefros1.
I can share additional insights into making sure you'll not get duplicate sales receipt numbers in QuickBooks Online (QBO).
Once you enter a number, QuickBooks will automatically increment it to avoid duplicates. As a workaround, you'll need to enable the Custom transaction numbers option from your Account and Settings so you can enter your desired digits.
- Click the Gear icon, then select Account and Settings.
- Select Sales from the left menu.
- Go to the Sales form content section and toggle the Custom transaction numbers to turn on the automatic numbering.
- Hit Save, then Done.
I've added this article that'll guide you in case you want to send your receipts and bills to QBO. It also includes a link about classifying transactions: Email receipts and bills to QuickBooks Online.
Additionally, you may read through if you want to focus on certain details of reports in QBO that matter the most to you: Customize reports in QuickBooks Online.
Always feel free to visit us here in the Community if you have other questions about creating sales receipts. I'm always here to help. Have a great day!
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